根据沙门氏菌invA基因、副溶血性弧菌toxR基因和大肠杆菌O157:H7 RFBE基因的保守序列,设计引物和探针,通过优化反应体系,测定其灵敏度和特异性,建立了可同时检测上述三种致病菌的多重实时荧光PCR方法。该方法对纯茵的检测灵敏度均低于1O cfu/PCR反应体系。人工染菌样品经6h增菌,检测的灵敏度可低于10cfu/25g;对48株标准/参考菌株的检测结果,只有目的菌株呈阳性反应;而定量检测批内和批间的变异系数均小于2%。应用本法检测人工染菌样品和进出口水产品样品,结果与sN标准方法检测结果一致。%A multiplex real-time PCR method was developed for the simultaneous detection of Salmonella spp, Vibrio parahaemolytichus and Escherichia Coli O157:H7 based on the primers and probes designed based on the conserved domains of invA gene for Salmonella spp,
展开▼